Hypertherm Kit-O-Ring:Ht400 Air-Inj W-M - 025031 by Hypertherm Save -8% $10.26 SKU HYP025031 Hypertherm - SKU HYP025031 Add accessories to hypertherm kit-o-ring:ht400 air-inj w-m - 025031. Close Add Your items total will automatically update after adding options or accessories. You can edit your selections in the cart. Select Options & Accessories Quantity Add to cart